Unable to detect adb version, adb output in Android Studio 3.3.2

I have done following task for solutions;

• Download and update platform-tools
• Change Sdk path and re-download
• Uninstalled Android Sdk platform-tools and Android Sdk tools after re-install.
• Update adb path in Environment
• Change virtual memory size

But it's still not working... I'm using android studio version 3.3.2

error show like Unable to detect adb version means connection devices showing none when i run the app

I solved my problem. That was the visual studio installation problem. In my system visual studio c++ 2015 installed. Just repair or re-installed it.